Broken spear tip help

I was packing my gear and triped over the gun I forgot I set down. The tip snapped where the pin goes through for the "wings". Anyway, it is a Mares pneumatic gun and I have discovered there are different size threads available. It looked to be cracked already. Are the tips gun specific, or just use a couple different thread sizes. I was leaving early for the cove, but now need to wait till 9:30 when the shops around here open. Is there any chance that one of you have a spare tip that may work that I can get from you at GS? Are there any shops north of Lake Mendo that may have a tip?
 Thanks, Rob

Rob, you should check with Sub-Surface Progression Dive Shop in Fort Bragg. They may have that tip you're looking for. They open from 8am to 6pm Sunday through Friday and 7am to 7pm on Saturday. Good luck.

18600 N Highway 1
Fort Bragg, CA 95437
(707) 964-3793